An updated version of the computational package SIMPRE that uses the standard conventions for Stevens crystal field parameters

The crystal field approach used by SIMPRE is analyzed, verifying the exactness of the results concerning energy levels and magnetic properties calculated by the package. To coincide with the prevailing conventions, we reformulate the presentation of the crystal field parameters, so that the results are now, also from a formal point of view, strictly correct. New calculations are presented to test the influence of neglecting the excited J states, a common but critical approximation employed by SIMPRE. For that, we examine the case of Er(trensal) complex (H3trensal = 2,2′,2″‐tris(salicylideneimino)triethylamine) where the influence of this approximation is found to be minimal. A patched version of the code, SIMPRE 1.1, and an updated version of the user manual are now available. Finally, we comment on “Software package SIMPRE – revisited,” which apparently revisits a software package without inspecting or using the code. © 2014 Wiley Periodicals, Inc.

[1]  José J. Baldoví,et al.  Two pyrazolylborate dysprosium(III) and neodymium(III) single ion magnets modeled by a Radial Effective Charge approach , 2013 .

[2]  L. Sorace,et al.  Lanthanides in molecular magnetism: old tools in a new field. , 2011, Chemical Society reviews.

[3]  José J. Baldoví,et al.  Rational design of single-ion magnets and spin qubits based on mononuclear lanthanoid complexes. , 2012, Inorganic chemistry.

[4]  Jinkui Tang,et al.  Equatorially coordinated lanthanide single ion magnets. , 2014, Journal of the American Chemical Society.

[5]  T. Yamamura,et al.  Wheel-shaped Er(III) Zn(II)3 single-molecule magnet: a macrocyclic approach to designing magnetic anisotropy. , 2011, Angewandte Chemie.

[6]  Czesław Rudowicz,et al.  The generalization of the extended Stevens operators to higher ranks and spins, and a systematic review of the tables of the tensor operators and their matrix elements , 2004 .

[7]  C. Rudowicz,et al.  Transformation relations for the conventional Okq and normalised O'kq Stevens operator equivalents with k=1 to 6 and -k⩽q⩽k , 1985 .

[8]  José J. Baldoví,et al.  Modeling the properties of uranium-based single ion magnets , 2013 .

[9]  C. Rudowicz,et al.  Implications of Invalid Conversions between Crystal-Field Parameters and Zero-Field Splitting Ones Used in Superposition Model , 2014 .

[10]  J. Long,et al.  Exploiting single-ion anisotropy in the design of f-element single-molecule magnets , 2011 .

[11]  Eugenio Coronado,et al.  SIMPRE: A software package to calculate crystal field parameters, energy levels, and magnetic properties on mononuclear lanthanoid complexes based on charge distributions , 2013, J. Comput. Chem..

[12]  K. Stevens Matrix Elements and Operator Equivalents Connected with the Magnetic Properties of Rare Earth Ions , 1952 .

[13]  José J. Baldoví,et al.  Modeling the properties of lanthanoid single-ion magnets using an effective point-charge approach. , 2012, Dalton transactions.

[14]  I. Ryabov On the generation of operator equivalents and the calculation of their matrix elements. , 1999, Journal of magnetic resonance.

[15]  B. Flanagan,et al.  Ligand-field analysis of an Er(III) complex with a heptadentate tripodal N4O3 ligand. , 2001, Inorganic chemistry.

[16]  K. Pedersen,et al.  Modifying the properties of 4f single-ion magnets by peripheral ligand functionalisation , 2014 .